after becoming entangled in the investigation that derailed the career of david petraeus. suddenly, last night, the scandal involving two very different women, jill kelley and paula broadwell ensnared not only petraeus, but his successor. john allen who took over for petraeus in afghanistan. >> for all that you have done for me and our -- >> reporter: the general is married with a sterling record. on a flight to australia monday night, aids to leon panetta exposed a dramatic turn in the petraeus case. they uncovered what the pentagon called potentially inappropriate communications between the general and jill kelley who he and his wife got to know in tampa, and were reviewing between 20 and 30,000 pages of documents, including e-mails over two years. officials say some were flirtatious. the general strongly denies an improper relationship. the fbi discovered the e-mails during its investigation of kelley's e-mails. sparked by her complaints about anonymous threats which turned out to be from paula broadwell. they found no wrongdoing by general allen, but turned the files o